Yet talent comes with cost, especially with Irving. League sources say executives, coaches and players who were present during Irving’s time in Cleveland and Boston shared with the Nets negative intel — his unresponsiveness and truculence with coaches, his lack of self-awareness with teammates, his constant defiance of offensive game plans, his disinterest in playing off the ball. But the Nets, multiple sources say, knew that bringing Irving aboard was the cost of doing business: No Irving, No Kevin Durant.